28318207903 has 2 divisors, whose sum is σ = 28318207904. Its totient is φ = 28318207902.

The previous prime is 28318207901. The next prime is 28318207921. The reversal of 28318207903 is 30970281382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28318207903 - 2¹ = 28318207901 is a prime.

Together with 28318207901, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28318207903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28318207901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159103951 + 14159103952.

It is an arithmetic number, because the mean of its divisors is an integer number (14159103952).

Almost surely, 2^28318207903 is an apocalyptic number.

28318207903 is a deficient number, since it is larger than the sum of its proper divisors (1).

28318207903 is an equidigital number, since it uses as much as digits as its factorization.

28318207903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 28318207903 in words is "twenty-eight billion, three hundred eighteen million, two hundred seven thousand, nine hundred three".